The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 1 |
| 7 | 10 |
| 8 | 1 |
| 9 | 25 |
| 10 | 15 |
| 11 | 1 |
| 12 | 56 |
| 13 | 105 |
| 14 | 1 |
| 15 | 119 |
| 16 | 490 |
| 17 | 105 |
| 18 | 1 |
| 19 | 246 |
| 20 | 1918 |
| 21 | 1260 |
| 22 | 1 |
| 23 | 501 |
| 24 | 6825 |
| 25 | 9450 |
| 26 | 945 |
| 27 | 1 |
| 28 | 1012 |
| 29 | 22935 |
| 30 | 56980 |
| 31 | 17325 |
| 32 | 1 |
| 33 | 2035 |
| 34 | 74316 |
| 35 | 302995 |
| 36 | 190575 |
| 37 | 10395 |
| 38 | 1 |
| 39 | 4082 |
| 40 | 235092 |
| 41 | 1487200 |
| 42 | 1636635 |
| 43 | 270270 |
| 44 | 1 |
| 45 | 8177 |
| 46 | 731731 |
| 47 | 6914908 |
| 48 | 12122110 |
[1,1,1,3,1,10,1,25,15,1,56,105,1,119,490,105,1, 246,1918,1260,1,501,6825,9450,945,1,1012,22935, 56980,17325,1,2035,74316,302995,190575,10395,1, 4082,235092,1487200,1636635,270270,1,8177,731731, 6914908,12122110] |